12 volt flashing LED

hey guys, im wanting to add a lil "alarm" to my truck to remind me when the tail gate is open

all i need is a single 12 volt LED, preferably in red, that flashes when a 12 volt signal is applied
i know, i can get them off ebay all day long but then id end up spending 6 dollars worth of shipping to a 2 dollar part

i thought maybe one of you guys has one kicking around i could buy for a fair price and get shipped for the price of a stamp
Author: diymirage